IIRC he doesn't think set piece matters.
Lodesmo?
But you're talking forwards generally not scrums.?
Forwards generally, bar scrums.
As the Kiwis are pioneering, or at least leading, forwards at the top level in unstructured play have to develop many of the core skills of backs to enable an even more effective, fast-paced, offloads-heavy, low-error-rate ensemble form of that mode of play.
As M Byrne has firmly noted, Aus elite terms seem principally indoctrinated into multiple forms of structured play and are far less able, skills and composure wise, in unstructured play. This applies as much to forwards as backs.
One of the many reasons coaching innovation is needed in the latest versions of the modern game, at the highest levels.